Conversion coatings of tin with cobalt and bismuth for aluminum

Details Conversion coatings of tin with cobalt and bismuth for aluminum Conversion coatings of tin with cobalt and bismuth for aluminum

1999-08-16

2000-10-10

Jones, Deborah

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

148243, 148273, 148275, 148285, 428650, 428652, 428628, 428629, 428469, 4289088, 428926, 428936, B32B 1501, C23C 2200

Patent

active

061299960

ABSTRACT:
An aluminum or aluminum alloy surface which during use is exposed to sliding friction has a chemical conversion coating of mostly tin with 0.2-10.0 wt. % cobalt and 0.1 to 12 wt. % bismuth. For example, a swashplate of a swashplate type compressor may be conversion coated on at least part thereof, that is the part that during use contact the shoes. Preferably, the coating is between 0.8 to 2.5 microns thick. The coating on the swash plate permits the use of low silicon alloy aluminum without the need of metal plating or high finish polishing.

REFERENCES:
patent: 4252618 (1981-02-01), Grenda
patent: 5056417 (1991-10-01), Kato et al.
patent: 5655432 (1997-08-01), Wilkosz et al.
patent: 5864745 (1999-01-01), Kawagoe et al.
patent: 5911809 (1999-06-01), Cordy

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